The effects of amino acids on glucosinolates of cabbage

Glucosinolates(GS) composition and contents were analyzed in two cabbage cultivars zhonggan 21(ZG21) and 06-115 by foliar application of 6 kinds of amino acid.Results showed each cabbage cultivar contained 9 glucosinolates in all treatments.Amino acids had an effect on glucosinolates contents in cabbage cultivar.For cultivar 06-115,the total glucosinolate,aliphatic glucosinolate and glucoraphanin contents were increased significantly by cysteine and methionine treatment.Compared with CK,Foliar application of cysteine raised total glucosinolate,aliphatic glucosinolate and glucoraphanin content by 63.0%,69.6% and 69.1%,respectively.glucobrassicin content increased to 725.6 μmol/kg,FW in the foliar application treatments of cysteine.For cultivar ZG21,the total glucosinolate,aliphatic glucosinolate,indolyl glucosinolate and glucoraphanin increased by 27.2%,39.6%,15.3% and 26.2%,respectively in the foliar cysteine treatments comparing with control.Glucobrassicin content was the highest(292.7 μmol/kg,FW) in the foliar cysteine treatments,followed by glutamine and glycine treatment.